Ternary Nasicon-Typed Na3.8mnv0.8zr0.2(Po4)3 Cathode with Stable Mn2+/Mn3+ Redox and Fast Sodiation/Desodiation Kinetics for Na-Ion Batteries

In Situ Atomic‐Scale Investigation of Structural Evolution During Sodiation/Desodiation Processes in Na3V2(PO4)3‐Based All‐Solid‐State Sodium Batteries

“…[35] At full desodiation, the value of the volume change of Na 3 VP is ≈8.8%, which is larger than that of Na 4 MnV(PO 4 ) 3 (8.68%), [37] Na 4 MnCr(PO 4 ) 3 (7.7%), [38] and Na 3.8 MnV 0.8 Zr 0.2 (PO 4 ) 3 (4.9%). [39] The result is against previous study since the larger volume change usually leads to poor cyclability. [40] To investigate the structural evolution of Na 3 VP owing to its close relationship with the electrochemical performance, the operando XRD experiment was conducted in this work.…”

“…[ 35 ] At full desodiation, the value of the volume change of Na 3 VP is ≈8.8%, which is larger than that of Na 4 MnV(PO 4 ) 3 (8.68%), [ 37 ] Na 4 MnCr(PO 4 ) 3 (7.7%), [ 38 ] and Na 3.8 MnV 0.8 Zr 0.2 (PO 4 ) 3 (4.9%). [ 39 ] The result is against previous study since the larger volume change usually leads to poor cyclability. [ 40 ]…”